The McLaren M7C was so extreme, F1 immediately banned it

The front wing was dubbed "the Guillotine."

Rules change all the time in Formula 1. Teams spend millions to innovate solutions, which the FIA invariably and quickly bans on the basis of safety or unfair advantage. McLaren, being one of the oldest teams on the grid, has had a lot of novel designs that didn't make it beyond a Grand Prix or two, or, in the case of the M7C, one single day. On May 15, 1969, McLaren showed up the day before the Monaco Grand Prix with a modified M7A. The car used a radical aerodynamics package that was quickly banned. That's how this unique single-seater came to be called "The Thursday Car." Learn the full story in the brief three-minute clip below.